I have CP 8831 and Cisco 2921 with IOS version 15.0 and CME version 10.5. I have tried the firmware version 9 and 10 for the CP 8831 but none is registering.   The phone doesn't go beyond the Cisco logo. I have tried to follow the link but still not ...

Hello, I am using Cisco 2921 CME.I cannot make international calls and I cannot receive any call through the gateway. Kindly help.Below are the debug messages . I will be happy to provide more info.*Sep  1 13:46:32.691: ISDN Se0/0/0:15 Q931: RX <- DI...